N.Y.C. Admin. Code § 28-315.1: § 28-315.1 General.

Buildings must be in compliance with the retroactive requirements of the provisions of this code. Such requirements are listed in this article along with the dates by which compliance must be achieved. The retroactive requirements of the 1968 building code continue in effect under this code in accordance with section 28-102.4.1 of this code. The dates for compliance with the retroactive requirements of the 1968 building code are as set forth in the applicable provisions of such 1968 building code. Failure to comply with a retroactive requirement of this code or of the 1968 building code by the date specified for such compliance is a violation of this code.